Messages in this thread | | | Date | Sun, 6 Jan 2002 18:40:58 -0700 | From | Richard Gooch <> | Subject | Re: [PATCH] DevFS support for /dev/cpu/X/(cpuid|msr) |
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H. Peter Anvin writes: > Richard Gooch wrote: > > > > > So you mean something like this: > > > > void devfs_per_cpu_register (const char *leafname, unsigned int flags, > > unsigned int major, unsigned int minor_start, > > umode_t mode, void *ops); > > > > void devfs_per_cpu_unregister (const char *leafname); > > > > with code in the per-cpu boot code to create the /dev/cpu/%d > > directories. > > Yes, that sounds like a good way to do it.
Unfortunately, there doesn't seem to be a really nice place to put generic SMP startup code. Each arch defines it's own per-cpu startup code. As Matt asked in a private email, it would require hacks to each arch to support this (Matt: this is my reply:-). While it would be fairly simple to add a call to a devfs_cpu_register() function to each arch, this does seem a bit hackish.
So I'd like to propose a new file (say kernel/smp.c) which has generic startup code for each CPU. To start with, it can have a generic_cpu_init() function, which is called by each arch. Note that this function would be called for the boot CPU too.
Comments?
Regards,
Richard.... Permanent: rgooch@atnf.csiro.au Current: rgooch@ras.ucalgary.ca - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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